A process model for electron beam welding with variable thickness

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Colleges, School and Institutes

External organisations

  • University of Oxford

Abstract

A process model for electron beam (EB) welding with a variable thickness weld joint has been developed. Based on theoretical aspects and experimental calibration of electron beam focusing, welding parameters including beam power, focus current, working distance and welding speed were formulated in the heat source model. The model has been applied for the simulation of assembly of components in a gas turbine engine compressor. A series of metallographic weld sections with different welding thickness were investigated to validate the predicted thermal results. The workpieces were scanned both prior to- and after welding, using automated optical metrology (GOM scanning) in order to measure the distortion induced in the welding process. The measured result was compared with predicted displacement. This work demonstrates the attempts to improve the EB welding process modelling by connecting the heat input directly from the actual welding parameters, which could potentially reduce (or even remove) the need for weld bead calibrations from experimental observation.

Details

Original languageEnglish
Title of host publicationPhysical and Numerical Simulation of Materials Processing VII
Publication statusPublished - 2 Aug 2013
Event7th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS 2013 - Oulu, Finland
Duration: 16 Jun 201319 Jun 2013

Publication series

NameMaterials Science Forum
Volume762
ISSN (Print)0255-5476

Conference

Conference7th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS 2013
CountryFinland
CityOulu
Period16/06/1319/06/13

Keywords

  • Electron beam welding, Heat source parameters, Variable welding thickness